Testimony
17e94092a1
* Add Raspberry Pi Pico port - Adds BACnet/IP with abstracted network layer - Adds BACnet MS/TP support using RS485/UART - Includes README with examples * Add Pico 2 MS/TP demo, CI, and docs
109 lines
3.3 KiB
C
109 lines
3.3 KiB
C
/**************************************************************************
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*
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* Copyright (C) 2025 Testimony Adams <adamstestimony@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0
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*
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*********************************************************************/
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#include "dlenv.h"
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#include <stdio.h>
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volatile struct mstp_port_struct_t MSTP_Port;
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/* Internal state associated with that port */
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static struct dlmstp_user_data_t MSTP_User_Data;
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static uint8_t Input_Buffer[DLMSTP_MPDU_MAX];
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static uint8_t Output_Buffer[DLMSTP_MPDU_MAX];
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static struct dlmstp_rs485_driver RS485_Driver = {
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.init = rs485_init,
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.send = rs485_bytes_send,
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.read = rs485_byte_available,
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.transmitting = rs485_rts_enabled,
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.baud_rate = rs485_baud_rate,
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.baud_rate_set = rs485_baud_rate_set,
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.silence_milliseconds = rs485_silence_milliseconds,
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.silence_reset = rs485_silence_reset
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};
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// TO BE IMPROVED
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volatile bool g_mstp_have_token = false;
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volatile uint8_t g_last_frame_type = 0;
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volatile uint8_t g_last_src = 0;
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volatile uint8_t g_last_dst = 0;
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static void mstp_frame_rx_complete_cb(
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uint8_t src, uint8_t dst, uint8_t frame_type, uint8_t *buf, uint16_t len)
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{
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(void)buf;
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(void)len;
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g_last_src = src;
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g_last_dst = dst;
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g_last_frame_type = frame_type;
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// TO BE IMPROVED (For other frame types as needed)
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if (frame_type == FRAME_TYPE_TOKEN) {
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g_mstp_have_token = true;
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}
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}
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bool pico_dlenv_init(uint8_t mac_address)
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{
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/* RS-485 low-level init (pins, UART config, etc.) */
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RS485_Driver.init();
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/* Configure MSTP port structure that the core stack will drive */
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MSTP_Port.Nmax_info_frames = BACNET_MSTP_MAX_INFO_FRAMES;
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MSTP_Port.Nmax_master = BACNET_MSTP_MAX_MASTER;
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MSTP_Port.InputBuffer = Input_Buffer;
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MSTP_Port.InputBufferSize = sizeof(Input_Buffer);
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MSTP_Port.OutputBuffer = Output_Buffer;
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MSTP_Port.OutputBufferSize = sizeof(Output_Buffer);
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/* No ZeroConfig / slaves / auto-baud for this Pico port (you can tweak) */
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MSTP_Port.ZeroConfigEnabled = false;
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MSTP_Port.SlaveNodeEnabled = false;
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MSTP_Port.CheckAutoBaud = false;
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MSTP_Zero_Config_UUID_Init((struct mstp_port_struct_t *)&MSTP_Port);
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/* Hook the RS-485 driver into the MS/TP layer */
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MSTP_User_Data.RS485_Driver = &RS485_Driver;
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MSTP_Port.UserData = &MSTP_User_Data;
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/* Start the MS/TP state machine using our port */
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if (!dlmstp_init((char *)&MSTP_Port)) {
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return false;
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}
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/* Apply logical MS/TP parameters */
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dlmstp_set_mac_address(mac_address);
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dlmstp_set_baud_rate(RS485_BAUD_RATE);
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// dlmstp_slave_mode_enabled_set(true);
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dlmstp_set_max_master(BACNET_MSTP_MAX_MASTER);
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dlmstp_set_max_info_frames(BACNET_MSTP_MAX_INFO_FRAMES);
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dlmstp_set_frame_rx_complete_callback(mstp_frame_rx_complete_cb);
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// TO BE IMPROVED (Add other callbacks as needed)
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dlmstp_set_frame_not_for_us_rx_complete_callback(NULL);
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dlmstp_set_invalid_frame_rx_complete_callback(NULL);
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dlmstp_set_frame_rx_start_callback(NULL);
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return true;
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}
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/* The stack may call this periodically; for this Pico MS/TP-only port
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we don't need extra maintenance, so it's just a no-op. */
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void dlenv_maintenance_timer(uint16_t seconds)
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{
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(void)seconds;
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}
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/* Likewise, nothing special to clean up on embedded target */
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void dlenv_cleanup(void)
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{
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/* no action */
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}
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